1. Go to this page and download the library: Download jazzman/custom-post-type library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
jazzman / custom-post-type example snippets
use JazzMan\Post\CustomPostType;
$books = new CustomPostType('book');